/**
 * #      1519
 * 名称   子树中标签相同的节点数
 * 链接   https://leetcode-cn.com/problems/number-of-nodes-in-the-sub-tree-with-the-same-label
 * 题解   [110](https://leetcode-cn.com/problems/number-of-nodes-in-the-sub-tree-with-the-same-label/solution)
 * 通过率 28.7%
 * 难道   中等
 */

